Tubular concrete-metal construction.



No. 822,047. PATENTED MAY 29, 1 906 'W. "0. HOOPER & P. 211000.

TUBULAR CONCRETE METAL CONSTRUCTION.

APPLICATION FILED JUNE 11, 1905.

warren PATETh-JT orricn WALTER C. HOOPER AND FIERRE ZUCCO, OF BALTIMORE, MARYLAND. v

TUEE ULAPK GUEKJGFXETE METAL 'LJUN'STRUCTlQN.

Specification of Letters Patent.

Patented May 29, 1906.

application filed June 17, 1905' Serial No, 265,695-

residing at Baltimore, in the of Mary land, have invented certain new and useful Improvements in Tubular Concrete-,Motal Construction, of which the following is a.

specification.

This invention relates to improvements in reinforced concrete sections of tubes for use in the construction of sewers, conduits, or

tunnels; and the object of the invention is to such construction that. they may be set up and fitted togetherina trench in the groundwithout the necessity of constructing temporary molds or forms, as heretofore, for gmaintaining centers and around which the "concrete is packed until it hardens, after which the temporary structure has been removed and then again set up farther along in the trench.

The accompanying drawings illustrate the invention, in which g Figure 1 shows a part side and a part sectional elevation of a tubular structure, such as a sewer or tunnel, constructed in accordance with the invention. 2 illustrates a vertical cross-section of the same, the section being taken onthe line 2-2 of Fig. 1. Fig. 3 shows aerspective view of the supportsections and the arch-section, the two being separated one above the other. Fig. 4 illustrates a plan view of one side of the lower support-sections with the ends of the lower tu ular section in place, and Fig. 5-illustrates a horizontal sectional viewinverted or looking upward through the arch-section on the line 5 5 of Fig. 2.

, Referring'to' the drawings, numeral 1 designates one of the base or support sections, and 2 designates the arch section. In the present instance the support-sections,coinprise two segment members of the same construction, and as both are alike a description of one will be sufficient, These supports are each provided with an interior reinforce structure comprising metal bars orrods 3, of any jdesir'ed cross-sectional shape, suchas round or square, and this metal structure has I right angle portions 4:, which extend parallel withthe bottom and also with one vertical side and is also provided witha curved portion 5, which extends parallel with the intesuitable stay rod or bar 6 is also provided,

which connects the portions 4 and .5 adj acent' the juncture of bottom and side of the support. This metal reinforce structure is first formed and then set in a mold, and the concrete in plastic condition is then filled in themold areund the metal structure and permitted to set and harden before removing the mold. (line side of the base-support is concave or of a form corresponding'to that-which the sewer, tunnel, or conduit is to have, and this concave side is provided witha centrally- 1 projecting curved rib 7, which forms acu'rved recess or rabbet 8 at oppositesides of the base-support. hen the two quartenseg ments of the base-supports are placed together with cement at the 'joint ,between their abutting faces 9, they form an inverted arch in which the lower section ofthe congrior cylindric form of tunnel or s ew or. A

cretetuhes are to be fitted, as willpresently I I be described. v

The upper arch-sections 2 of the supports are preferably formed in a single piece, and each of these up or sections is provided with an interior'mta reinforce-frame 10, similar to the frames 3 in the base-support sections.

These upper arch-sections have in thepresent instance a concaveinner portion 11, which is provided on opposite sides with a laterallyprojecting curved or arched flange 12, which form supports for the ends of the upper section of conoretetube.

In practice the base-support and arcli'sec-. I

tions are-articles of manufacture and are made in the factory and sold in uantities, thus avoiding the setting up of molds and the making of numerous ca 'c'ulations the trench while buildin the sewer, tunnel, "or conduit, whichmethod of construction is very ex ensive and slow.

Itwi be understood that when the trench hasbeen dug for the sewer the base-support 3 sections are set up in the trench at regular in tervals and on suitable foundations. The top arched sections are then placed on the base-support sections and thetwo properly cemente together, thus forming a number of pier-likestruotures which are'to support the concrete tubes.

lnorder to lace the tube-sections in position, it is desirable that two conditions be provided forfirst,'the internal weight and pressure on the bottom tube-section, and, sec-f.

0nd, the externalweight and pressure soil and earth upon the to tube-section. Due provision has been ma e to meet these conditions by the lower curved recess or rabbet 8 in the base-support sections and by the laterally-projecting side flanges 12 on the archsection.

The tubes forming the conduit or sewer comprise lower and upper sections. The lower tube-sections 13 are provided at their ends with an outer circumferential recess 14 with an inner flange 15, while the upper tubesections 16 are of a reversed construction and are provided with an outer circumferential flange 17 and an inner recess 18. It will be seen by reference to Figs. 1, 4, and 5 that when the lower tube-section 13 is in position the inner flan e 15 on said lower section will project into the curved recess or rabbet 8 in the base-support section 1,"and its inner surface will be ush withthe curved surface of the centrally-projecting rib 7. When thus fitted together, cement having first been laced on the abutting edges, the lower tub ar section 13 will-be supported at each end by the recess-or rabbet 8. The upper tubular "section 16 is of the same diameter as the lower section, and when in position the outer circumferential flange 17 will lap over and rest on the laterally-projecting side flanges 12 on the arch-sections and the joint between the flanges 17 and 12 cemented.

After the tubular sections have been set in place we encircle the upper and lower sections with a rod or band 20, which hold the, sections together while the cemented joints are setting.

A sewer or conduit formed from concrete sections, as described, may be constructed ra idly and at less expense than those in w 'ch temporary frame structures are first built in the trench to form molds which must afterward be removed.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. As an article of manufacture a concrete pier comprising a base-supporting section aving an upper concave inner face and also having a curved recess or rabbet adjacent said concave face, and an arch-top section having a concave inner face and a flange on two opposite sides said concave face.

2. Asan article of manufacture a concrete pier comprising base supporting sections each having a concave inner face which is provided with a central rib to form a recess at each side and a top section also having a curved inner face which is flush with but broader than the rib on the supporting-sections. i

3. A tunnel, sewer or conduit having concrete piers each formed from a plurality of reinforced sections and the lower sections of the piers having concave faces with centrally-projecting ribs and the upper sections of the piers having concave faces with flanges projecting laterally adjacent said concave aces, and a concrete tube of a plurality of sections and the ends of said tube-sections overlap in the pier-sections whereby to form a us joint.

In testimony whereof We affix our signatures in presence of two. Witnesses.

WALTER o. HooPERQ PIERRE zuooo.

Witnesses I CHARLES B. MANN, Jr., Tnos. KELL BRADFORD.

projecting laterally from 

